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I think news and updates, maybe a blog in your site can make google "feel" it has to come back more times to refresh your site again ( "hum dude, they are doing something there)... Links to your site and to new articles in social media could help a lot.

The site is definitely indexed, but without knowing the specific URLs you are waiting on, it is a little difficult.

I ran a quick crawl with Screaming Frog and there are actually quite a few pages on the site which have the noindex meta tag in place - have you checked that the pages you are wanting indexed are not excluded with a tag?

yes site is indexed and crawled on regular basis before making these changes. don't know why not this time and not crawled around 2 weeks. yes i checked for thart all have including tag.Normally when u submitted your pages on few good social bookmarking, workout in webmasters, after generate few good back links all these thing are very helpful for page crawling.Still waiting for the page crawling.

I just add this meta tag (as below) to help to crawl the page but not sure how it is.<meta name="robots" content="index, follow">

I am just worried that if we make changes in our website pages and submit the site map in webmaster (that's mean that we are put request to search engine crawler to crawl the page ) but why they do not.

what is the actual reason behind this.

also can you please explain me that what the other methods to force the search engine crawler to crawl our page.

Before making these changes they crawled regular basis and I just changed a meta title keywords and description but don't know the reason why after making these changes on few pages my web pages are not crawled in past 2 weeks and and still they are not crawled.

Martin i have my robots.txt in public.html and i allow the page that should be crawled by the bots.waiting fro the page crawling.

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